[Improve][DataProxy] Optimize the implementation logic of the Source

[gosonzhang]

Description

At present, there are several problems in the Source:

1. InLongMsg V0 and V1 versions use two similar implementations for processing, and here we consider merging them for easy maintenance and management;
2. Consider extracting the common implementations of HTTP, TCP, and UDP on the source side, if there are other different encoding schemes, you only need to implement the corresponding MessageFactory and MessageHandler, and the related protocol Source processing does not need to be changed, which is convenient for other protocol extensions;
3. Adjust relevant implementation code, optimize logic, and supplement test cases

InLong Component

InLong DataProxy

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

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